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- Member of: Theses and Dissertations
- Member of: Center for Earth Systems Engineering and Management

An inter-temporal life cycle cost and greenhouse gas emissions assessment of the Los Angeles roadway network is developed to identify how construction decisions lead to embedded impacts and create an emergent behavior (vehicle miles traveled by users) in the long run.
A video of the growth of the network and additional information are available here.

Study Background: Researchers at ASU have determined that significant energy and environmental benefits are possible in the Phoenix metro area over the next 60 years from transit-oriented development along the current Valley Metro light rail line. The team evaluated infill densification outcomes when vacant lots and some dedicated surface parking lots are repurposed for residential development. Life cycle building (construction, use, and energy production) and transportation (manufacturing, operation, and energy production) changes were included and energy use and greenhouse gas emissions were evaluated in addition to the potential for respiratory impacts and smog formation. All light rail infill scenarios are compared against new single family home construction in outlying areas.
Overview of Results: In the most conservative scenario, the Phoenix area can place 2,200 homes near light rail and achieve 9-15% reductions in energy use and emissions. By allowing multi-family apartments to fill vacant lots, 12,000 new dwelling units can be infilled achieving a 28-42% reduction. When surface lots are developed in addition to vacant lots then multi-family apartment buildings around light rail can deliver 30-46% energy and environmental reductions. These reductions occur even after new trains are put into operation to meet the increased demand.

In his writings over the past decade, Brad Allenby has proposed (at least) 16 principles of sustainable engineering (see references) that are collectively known as the Earth Systems Engineering and Management (ESEM) principles. These principles have merit and applicability in many disciplines and domains of discourse, but are sometimes awkward to use due to the quantity of words required to accurately express their meaning. In light of this, it has become necessary to formulate a simplified list of “abbreviated tags” for ease of reference in conversation and concise writing. This list of tags also makes the principles immediately accessible to those who may want to pursue the more thorough definitions offered by Allenby. The following tags have been proposed for use when a concise phrasing is required. The citation provided after the tag is, in my opinion, the most complete expression of Allenby’s thought on this principle. It can be used when citing the principle in written assignments or publications.